Message Provided url does not contain a valid NuGet feed. and HPE

Hello,
When adding extensions the following error is displayed: 
Message: Provided url does not contain a valid NuGet feed.

In addition, I get this message when trying to load the HPE 1.0.0 Extension.
Couldn't install the extension: 'HPE Server and Azure Stack HCI WAC Extensions'. Error: Error(s) validating platform integrity.

I was able to add HPE Server WAC Extension (Preview) 0.2.0 without any problems.


Does anyone have any suggestions on what this error means and how to correct?